allow filtering reverse dependencies by (major) release

[rursprung]

currently the reverse dependency overview shows all crates depending on the selected crate. while this can be informative it is often also important to know which crates depend on a specific major release (note: for 0.x releases the same would be true for the minor release!).

one concrete example is that it'd be great to easily check which crates already implement embedded-hal in one of the v1.0.0-alpha.* or v1.0.0-rc.* releases (see rust-embedded/embedded-hal#177 (comment)).

while the information is shown on the UI there's no option to filter for it.

this should, if possible, be semver based (just like the dependencies): if i check the reverse dependencies for v1.2.3 then i should also get to see crates depending on v1.0.0 (presuming they're not using =1.0.0, ^1.0.0, <1.2.0 or similar, of course)